You can now send IoT Analytics data set content results, which are materialized views of your IoT Analytics data, to an Amazon S3 bucket in your AWS account. This lets you easily use it with a downstream application for further processing or presentation to end-users. For example, you can automatically create a Glue Table containing a representation of your data set content results and its schema and run queries with Amazon Athena. Also, since the data set content results are saved in your Amazon S3 bucket, you can apply your own S3 permissions and manage them according to your governance policies.
from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/05/aws-iot-analytics-now-supports-data-set-content-delivery-to-amaz/